最新免费av在线观看,亚洲综合一区成人在线,中文字幕精品无码一区二区三区,中文人妻av高清一区二区,中文字幕乱偷无码av先锋

LPC47M172_07 Datasheet

  • LPC47M172_07

  • SMSC Corporation [Advanced I/O Controller with Motherboard ...

  • SMSC   SMSC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預覽

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
nReverseRequest, nInit
nAckReverse, PError
Xflag, Select
ECPMode, nSelectln
HostClk, nStrobe
Reference Document: IEEE 1284 Extended Capabilities Port Protocol and ISA Interface Standard, Rev
1.14, July 14, 1993. This document is available from Microsoft.
The bit map of the Extended Parallel Port registers is:
D7
PD7
Addr/RLE
nBusy
0
D6
PD6
nAck
0
D4
D3
D2
D1
D0
PD4
PD3
PD2
PD1
PD0
Address or RLE field
PError
Select
nFault
0
0
0
Direction ackIntEn SelectI
nInit
autofd strobe
n
Parallel Port Data FIFO
ECP Data FIFO
Test FIFO
0
1
0
0
0
0
Parallel Port IRQ
Parallel Port DMA
full
empty
nErrIntrE dmaEn serviceIntr
n
D5
PD5
NOTE
2
1
1
2
2
2
data
ecpAFifo
dsr
dcr
cFifo
ecpDFifo
tFifo
cnfgA
cnfgB
ecr
Note 1:
Note 2:
Note 3:
0
0
compress intrValue
MODE
These registers are available in all modes.
All FIFOs use one common 16 byte FIFO.
The ECP Parallel Port Config Reg B reflects the IRQ and DMA channel selected by the Configuration
Registers.
7.11
ECP Implementation Standard
This specification describes the standard interface to the Extended Capabilities Port (ECP). All LPC
devices supporting ECP must meet the requirements contained in this section or the port will not be
supported by Microsoft. For a description of the ECP Protocol, please refer to the IEEE 1284 Extended
Capabilities Port Protocol and ISA Interface Standard, Rev. 1.14, July 14, 1993. This document is
available from Microsoft.
7.11.1 Description
The port is software and hardware compatible with existing parallel ports so that it may be used as a
standard LPT port if ECP is not required. The port is designed to be simple and requires a small number of
gates to implement. It does not do any 鈥減rotocol鈥?negotiation, rather it provides an automatic high
burst-bandwidth channel that supports DMA for ECP in both the forward and reverse directions.
Small FIFOs are employed in both forward and reverse directions to smooth data flow and improve the
maximum bandwidth requirement. The size of the FIFO is 16 bytes deep. The port supports an automatic
handshake for the standard parallel port to improve compatibility mode transfer speed.
The port also supports run length encoded (RLE) decompression (required) in hardware. Compression is
accomplished by counting identical bytes and transmitting an RLE byte that indicates how many times the
SMSC/Non-SMSC Register Sets (Rev.
01-11-07)
Page 98
SMSC LPC47M172
DATASHEET

LPC47M172_07 PDF文件相關型號

LPC47M172-NW

LPC47M172_07相關型號PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術客服：

0571-85317607

網(wǎng)站技術支持

13606545031

客服在線時間周一至周五
9:00-17:30

關注官方微信號，
第一時間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！